package com.itheima.day03.ZuoYe.ZuoYe5;

public class Computer {
    public void startup(){
        System.out.println("Computer is starting...");
    }
    public void shutdown(){
        System.out.println("Computer is shutdown...");
    }
    public void connect(USB usb){
        usb.connect();
    }
    public void disconnect(USB usb){
        usb.disconnect();
    }
}
